Home made IHI/S475 twins
- Thread starter bonescarolfi
- Start date
Not sure how he did it but I know a few people who can get flages ,you can also cut up a stock down pipe to get the basic flange then fab up a few things to get it to accept a round pipe .
I've got flanges as well, this is my design.
The 3" v-band flange is just out of the picture on the tubing.
NOI, but I already know all about using the stock flange for something other than its intended use, and I still have Vaz's flange out in the garage, so I know all about those, and Ive seen some really interesting LB7 adapters, but Id still like to know what bones did anyways. 
* NOI - No Offense Intended
* NOI - No Offense Intended
Last edited:
I've got flanges as well, this is my design.
The 3" v-band flange is just out of the picture on the tubing.
Thats the same way Rick is doing his down pipes too , i have a little bit different way soon to be done
I'd way rather work with a downpipe lol, making the flow go upwards with the way the oval is shaped makes it a pain. This was the best way I could find for best looking flow, the turbine outlet flows directly into the 3" pipe and the wastegate sort of dumps into the flow downstream during the 90*.
I hacked up the stock downpipe and used that. It isnt the prettiest looking thing but it works and isnt too hard to do. The stock IHI probably wont stay there forever anyways.
I've got flanges as well, this is my design.
The 3" v-band flange is just out of the picture on the tubing.
That looks a lot better than mine.
So far so good on the hood stack. Smoke seems to go around the truck and over the pass side mirror and it only makes a slight whistle while cruising.
I ordered a t6 flange with a mounting tab on it but they sent me the wrong one so i made and attached my own mounting flange to the t6 flange and from there i made a bracket that mounts to the motor in 3 places. There is just enough gap around the turbo to not hit anything when the motor twists.
The stock IHI is internally gated so after somewhere in the low 20's psi the gate is open and diverts more air to the big turbo. I have to do some more testing to decide if the waste gate is ok at the stock setting or if i need and adjustable one.
Probably should have multi quoted right away. Oh well.
any dyno or track results?
If everything goes good ill have 1/4 mi times on Sunday.
